| Signe | | SEENG-ne (Swedish, Norwegian), SEE-ne (Danish) | Swedish, Norwegian, Danish | |
| Signy | | - | Swedish, Norwegian, Danish | |
| Sigrid | | SEEG-reed (Finnish) | Norwegian, Swedish, Danish, Estonian, Finnish (Archaic) | |
| Sigrun | | - | Swedish, Norwegian, Danish | |
| Sigurd | | SEE-gurd (Swedish) | Norwegian, Danish, Swedish, Norse Mythology | |
| Sigvard | | - | Swedish | |
| Simon | | SIE-mən (English), see-MAWN (French), ZEE-mawn (German), SEE-mawn (Dutch) | English, French, Swedish, Norwegian, Danish, German, Dutch, Hungarian, Slovene, Romanian, Macedonian | |
| Siri | | SEE-ree (Swedish) | Swedish, Norwegian, Danish | |
| Siv | | SEEV | Swedish, Norwegian, Danish, Norse Mythology | |
| Sixten | | - | Swedish | |
| Sofia | | zo-FEE-ah (German), so-FEE-ah (Italian), soo-FEE-ə (Portuguese), SO-fee-ah (Finnish) | Norwegian, Swedish, German, Italian, Portuguese, Catalan, Greek, Finnish, Estonian, Slovak, Romanian | |
| Solveig | | SOOL-vie (Norwegian), SOOL-vay (Swedish) | Norwegian, Swedish | |
| Solvig | | - | Swedish | |
| Sonja | | ZAWN-yah (German), SON-yah (Finnish) | German, Dutch, Swedish, Norwegian, Danish, Icelandic, Finnish, Slovene, Serbian, Croatian, Macedonia | |
| Staffan | | - | Swedish | |